Motor mechanism



No. 620,9l6. Patented Mar. 14, 899.

J. A. HAFNER.

MOTOR MECHANISM.

(Application filed July 29, 1897.) (No Model.) 4 Sheets-Sheet 1.

wrms'sslas INVENTOAR,

m: NORRIS PETERS no, PHOTCLLXTNO WASHINGTON, 0v 2.

No. 620,9I6. Patented Mar. l4, I899.

J. A. HAFNER.

MOTOR MECHANISM.

(Application filed July 29, 1897.) (No Model.) 4 Sheets8heet 2.

INVENTOR WITNESSES No. 620,916. I

- J. A. HAFNER.

MUTDB MECHANISM.

[Application filed July 29, 1897.)

Patented Mar. |4,' I899.

d 4 S heefi sSheet 3,

WITNESSES No. 620,9l6. Patented m r. l4, I899, J. A. HAFNER. MoronMECHANISM.

(Apphcatmn filed July 29, 1897.) NNNNNN I.) 4 SY eeeeee Sheet '4.

NITED STATES.

PATENT OFFICE JOHN A. HAFNER, OF PITTSBURG, PENNSYLVANIA.

MOTOR MECHANISM.

SPECIFICATION forming part of Letters Patent No. 620,916, dated March14, 1899.

Application filed July 29 1897. Serial No. 646,303. (N 1 05610specification, in which Figure 1 is a top plan View, partly'broken away,of my improved motor mechanism. Fig. 2 is a vertical section of thesame. Fig. 3 is a side elevation, the upper half being shown in verticalsection. Figs. 4 and 5 are partial vertical sections showing modifiedforms. Fig. 6 is a perspective view of the ring and disks I employ. Fig.7 is a partial side elevation of my preferred form of ring.

.angles to that of Fig. 18.

Fig. 8 is a partial sectional View of the ring of Fig. 7 in connectionwith the disks. Figs. 9 and 10 are end elevations looking in oppositedirections. Fig. 11 is a vertical sectional view of a modified form.Fig. 12 is a verti cal section at right angles to that of Fig. 11. Figs.13 and 14c are detail views of the disks. Figs. 15 and 16 are sectionalviews illustrating different forms of sleeves for applying the device tomotors. Fig. 17 illustrates an oil-trap. Fig. 18 is a vertical sectionalview of a third form of my invention, Fig. 19 be: ing a view of the sameform taken at right Fig. 20 is a perspective View of the ring and disksemployed in this modification. Figs. 21 and 22 are detail views ofsprings employed therein; and Figs. 23 and 24 are partial enlargedsectional views similar to Figs.3 and 18, respectively.

My invention relates tov the connections between rotary shafts andmechanism which is operated thereby and is designed to afiord a yieldingpower connection which shall prevent excessive strain and wear upon thestarting of the shaft in motion and also to provide a spring connectionbetween the shaft and mechanism driven thereby, which in eitherdirection of rotation will operate to relieve strain upon the shaft andits driving-motor.

In the drawings, referring to the form shown in Figs. 1, 2, and 3, 2represents a motor-shaft, such as the armature of an electric motor, and3 is a hub keyed to this shaft. Secured to the hub is a central ring 4.,having side flanges 5 5 these disks upon each side and having theirfaces in frictional contact therewith and with the projecting portion ofthe ring 4 are disks 7, 8, and 9, each disk 8 having upon one sideoppositely-located lugs 10 10. The leaves or disks 7 and 9 are providedwith projecting lugs 11 11, which engage the shoulders at the rear ofthe lugs 10 10 and assist in holding the three disks in correct relationto each other. Inclosing the ring and disks is a clutch-casing 12, whichsurrounds and rotates upon the hub 3, and through the opposite sides ofwhich extend bolts 13, which pass through holes in the two sets of disks7, 8, and 9 and hold them in frictional contact with the ring 4 andtoothed disks, the amount of friction being regulated by springs 14:,surrounding the bolts. Surrounding and rotat ing upon the clutch-casingis a spring-casing 15, containing a spring 16 of circular shape, havinghooked ends 17, which ends engage the lugs 10 upon the disks 8 and alsolugs 18 projecting inwardly from the spring-casing. The lugs 10 and 18register with each other crosswise when the parts are at rest. The innerseparable cover portion of this springcasing is provided with innerteeth 19, engaging the teeth of a pinion 20, which revolves loosely uponthe armature-shaft and gears with the driving mechanism of the car. Toprotect the parts from dust, &c., I preferably employ the screw-cap 30,which engages the outer casing.

In operation, when the shaft 2 begins to ro-' tate, thereby rotating thering 4 and disks 6, one set of the lugs 10 upon the disks 8 will startto coil up the spring 16, the hooked end of the spring which is engagedby these lugs leaving the lugs upon the casing, the other end being heldin place by the other casing-lugs opposite thereto. As the greatestresistance occurs at the time of starting the car this resistance willcause the alternate leaves of the clutch to slip'past each other, thusgiving a yielding connection, and as this resistance decreases theslipping of the clutch will cease and the motion will be com municatedthrough the spring and its casing to the driving connections, the jar ofstarting the motor being thus taken up by the friction-clutch and thespring connection. It will be noticed that this spring operates equallywell, no matter in which direction the armature-shaft is rotated.

In my preferred form of the connected ring and disks (shown in Figs. 7and 8) it will be noticed that the lugs 11 are done away with, the ring8 being provided with annular seats for the rings 7 and 9, the boltconnection being relied upon to hold these parts in proper positionrelative to each other.

In the form of Fig. 4 disks 6, 7,8, and 9 are done away with, the twoparts of the easing 12 hearing frictionally upon the ring 4 being heldby the bolts 13. In this case the lugs are placed upon the two parts ofthe clutch-casing instead of upon the disks 8, as before.

In the form of Fig. 5 the clutch is done away with entirely, the hub orring secured to the shaft carrying the lugs which engage the spring thusgiving the beneficial results of the spring connection to take up a jarin the starting of the car.

In the form of Figs. 11 and 12 I use only two of the toothed disks 6 andtwo of the frictiondisks 8". The clutch-casing is extended inwardly, asshown, and the lugs 1O are formed thereon instead of upon the disks 8.

In the form of Figs. 18, 19, and 20 the construction is substantiallythe same as that of Figs. 1, 2, and 3, except that the spring and lugsare so arranged that the spring is forced outwardly instead of beingwound up and drawn inwardly upon rotation of the armature-shaft, theparts being designated by the same numerals, differentiated by theexponent c.

In Figs. 21 and 22 I show different forms of springs for use in theapparatus of Figs. 18, 19, and 20.

In using my mechanism I preferably employ some sort of oiling device.Thus in Fig. 11 I show the armature-shaft bored out so as to form aninner oil-reservoir 21, which is closed by a screw-plug 21. In the shaftare provided transverse holes 22, in which lie loose pins 23, which arecut into' two pieces, as shown. The hub .5 is also provided with smallerholes 24, registering with the holes 22 and containing pins 25, havingheads, as shown, which normally close these holes, but are moved out bycentrifugal force when the parts are in motion, so as to allow oil toflow out into the clutch.

In Figs. 15 and 16 I show means for oiling when the device is attachedto an old armature-shaft, a separate sleeve 26 being secured to theshaft and containing the oil-reservoir. Vhen thick oil or grease isemployed, I preferably use a loose ball 29, which will Work about in'the oil-cavity and induce a flow through the oiling-duct.

In Fig. 17 I show the clutch-casing as provided with a headed pin 27 ina hole 28, which will drop when the parts are at rest and allow the oilto flow back through the clutch.

The advantages of my invention will be apparent to those skilled in theart, since the necessity for the usual complicated electrical controlleris done away with. My device renders the use of these complicatedcontrollers and circuit and resistance arrangements thereforunnecessary, and a series multiple switch, for example, is all that willbe needed, the only electrical device necessary being one arranged sothat the operator may regulate the speed. Instead of using a fixed ring4: upon the hub I may use a loose toothed disk, similar to the disks 6at this point.

Variations in the form and arrangement of the parts may be made by theskilled mechanic without departing from my invention, since What I claimis- 1. The combination witha casing,having an inner curved springconnected therewith, of a hub rotating in the casing and arranged to actupon said spring in either direction of rotation, substantially asdescribed.

2. The combination with a casing having therein lugs and a curved springwhose ends are arranged to engage the lugs, of a hub within the casingalso having projections ar ranged to engage the spring and therebyrotate the casing, substantially as described.

3. The combination with an outer casing and two spring-connected disks,having a spring connection therewith, of an intermediatepositively-driven disk between the said disks, substantially asdescribed.

4. The combination with a shaft having two or more disks connected toand driven thereby, of a disk or disks between them, a clutch-casingconnected to the latter disks,

bolts passing through the latter disk or disks and the clutch-casing,and springs surrounding the bolts outside of the casing; substantiallyas described.

5. The combination with a rotatory hub having a ring secured thereto, offrictiondisks secured to the ring, a second series of disks arrangedintermediate thereof, an outer casing and spring connections between thesaid casing and the second series of disks substantially as described.

6. The combination with a rotating hub having a ring secured thereto, offrictiondisks secured to the ring, and a second series of disks arrangedintermediate thereof, said second series having a spring connection witheach other, an outer casing and spring connections between the casin gand the second series of disks, substantially as described.

7. The combination with a rotatory hub having a ring secured thereto, offrictiondisks secured to the ring, a second series of disks arrangedintermediate thereof and having lugs, and a casing containing a curvedspring engaging the lugs substantially as dcscribed.

8. The combination with a rotatory hub having a ring secured thereto, offrictiondisks secured to the ring, a second series of disks arrangedintermediate thereof, an outer casing having spring connection with thesecond series of disks, bolts passing through the second series, andsprings surrounding the bolts substantially as described.

9. The combination with a shaft having a clutch connection with an innercasing, of an outer casing, and a spring connection between the same andthe inner casing, substantially as described.

10. The combination with a hub having a slotted ring provided withlateral flanges secured thereto, of toothed disks slipped over theflanges, the teeth engaging the slots of the ring, friction-disksbetween the toothed disks and the ring, an outer casing, and aconnection between the friction-disks and said casing, substantially asdescribed.

11. The combination with a hub, having a slotted ring provided withlateral flanges secured thereto, of toothed disks slipped over theflanges, the teeth engaging the slots of the ring, friction-disksbetween the toothed disks and the ring, and a casing havingspringpressed bolts passing through the friction disks, substantially asdescribed.

12. The combination with a hub, having a slotted ring provided withlateral flanges secured thereto, of toothed disks slipped over theflanges, the teeth engaging the slots of the ring, friction-disksbetween the toothed disks and the ring, a casing having bolts pass- 'ingthrough the friction-disks, and an outer casing having a springconnection with the friction-disks, substantially as described.

13. The combination with a hub having a slotted ring provided withlateral flanges se- 40 cured thereto, of toothed disks slipped over theflanges, the teeth engaging the slots of the ring, friction-disksbetween the toothed disks and the ring, a casing having springpressedbolts passing through the frictiondisks, lugs upon the friction-disks, asurrounding spring having hooked ends arranged to engage the lugs, and acasing also having lugs engaging the ends of the spring,substantially asdescribed.

14. The combination with a hub, of a casing surrounding the same andconnected thereto, said casing having teeth, and a pinion having thesame axis of rotation as the hub, the teeth of the pinion engaging theteeth of the casing and being longer than them, whereby the said pinionmay act as a coupling between the casing and another, elementsubstantially as described.

In testimony whereof I have hereunto set

